Application of p-y curves in excavation engineering
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摘要: 将横向受荷桩的p–y曲线法应用到深基坑工程中，提出了一种考虑支护结构和土之间非线性共同作用的弹性地基反力法计算模型，即对于基坑开挖面以上，采用根据p–y曲线建立的支护结构-土非线性共同作用的计算模型；基坑开挖面以下，将支护结构看作横向受荷桩，基坑开挖面以上土体看为超载作用在支护结构上。之后根据弹性地基梁的挠曲微分方程，推导出考虑非线性共同作用的弹性地基梁挠曲微分方程，应用有限差分法计算支护桩的内力和位移。Abstract: The p-y curve method for single pile under horizontal load is applied in excavation engineering. An elastic sugrade reaction model considering nonlinear interaction between protection-structure and soil for deep excavations is put forward. Above the pit plane, a computational model cansidering the protecting structure-soil nonlinear interaction is adopted; under the pit plane, the protection-structure is regarded as laterally loaded piles and the weight of soil above the pit excavation is applying to the protection-structure as an overloading. The differential equation of the elastic subgrade beam to consider the nonlinear interaction is derived based on the equation of the general elastic subgrade beam. The internal force and deflection of supporting piles are calculated by adopting finite difference method.
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Keywords:
- p-y curve /
- excavation engineering /
- computational model /
- nonlinear interaction
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